The installer has already been run once. As a safety measure, it has been disabled from running a second time. If you are absolutely sure you want to run it again, please go to your config.php file and locate (or add) a variable called 'installer_locked' and set it to 'false'. The line should look like this:

			'installer_locked' => false,
		

After this change has been made, you may click the "Start" button below to begin your installation. After the installation is complete, you will want to change the value for 'installer_locked' to 'true'.

For installation help, please visit the SugarCRM support forums.